Quick-opening die



Nov. 29, 1927. A 1,650,778

H. T. WHITE QUICK PENING DIE Filed April 2o, i925 V @mmf Nga Tag wf Pamesa Nev. 29,1927.

aan

imitar r. WHITE, or natia; Plinnsrnvsma.

ooroioo'rnmne una `applichi@ aieaapi-aao, i925. sensi No. 24,433.

With most quickepeningfdies it `is difieult, .if not inipossibldfto carry the thread upto a shoulder. The p sent invention 1s `destgned to obviatethis difficultyand acconiplishesit byk placing the chasers in anonclined guide which carries the forward lend of the chasers clear of the head while at the saine timev proyiding; sufiicient strength `and nniterral to` properly hold the chasers to thewvork. By this ymeans also the threads are arrangeddiagonally acrossthe ohaser andconsequently a greater `Width of thread Ypossible with a given Widthlofchaser. The invention also involves 'simplifiedV and" strengthened .construction.k Other features and details :of the invention will appear from the specification andelairnsu K y M j The invention is illustrated the accom panying drawings, as .follows :.-1- j n Eig. l shows an enduview of the die. i F ig.A 2 a longitudinal elevation, partly 1in section. I L 1 i Eig. 3 a section on the line 3- 3 1 Figut a section on theline inFig. "Fig 5 a section on the-line 5-5 in Fig. `Fig. 6 asectionon the line Sz-,6,3 in Fig. Fig. aseotion on the linefZ--fiin` Fig.4 Eig; 8 a ydetachedview. ofthe cain ring. FigQ an end elevation ofthe chaser. Fig. Al0 a side elevation of the Chaser'. v l'marks the head. This is seouredon `a rotating spindle2,`the head heingsecured on the spindle by a. screw 3 which extends through the head shanklL into the spindle. i 4 i, y j

`l the 1.1911211 011 @sich 17.-: z j is vflorced fc` rivarcljA `this Thefhead is provided with Chaser guide slots 4Q. These areinclin'ed Witlrt'heforward'pend inwardly. Chasers 5` are*l arrangedin Lthe slots'. The ycha-sers: have operating vslots in their faces at right anglesto the side edges of the chasers. This'niakes theslot at an inclination to the axis of the chuck. j chasers are arranged with their edges to the front andrear. andtheoperating slots are arranged in the side faces and are of less depth than the thickness of' the chasers from side face to side face, in other Words-the operating slots are of less depth than the circumferential dimensions or thicknesses ofthe chasers. Cam fingers 7 extend into the operating slots 6 andfguide the chasers inwardly and outwardly as the Cain fingers 6 are moved axially.V The cross dimensions of the operating slots are at least as great as the cross dimensions of the operating` fingers so that the operating lingers are received Wholly Within the operating slots. The cir- The j i formed on a lock ring 27. The lock cuinferential dimension of the 'fingers p,articnlarly should be narroyy enough so that theare` received Within the slots. By` this arrangement the guide slots which receive the chasers needno added. provision y in size to receive these fingers. 'llhecainfingersare `formed on a ring Siwhich is slidinglylnountf ed on the shank la" ofthe head. -l'I he-head is out out innnediatelyto the rear ofthe guide slotgto provide an opening through which the Afingers operate; ring` l0, is arranged around the head` and iniinediately over the frontend of thecain ring k8 and ,closes the opening to the slots9., l A y Series .Soeketsll are (arranged .inthe face of the ring 8 and springsvl are arrangedin illes@ Sockets and operate against the rear th'efefe is tOfIOVG-tl1-.e Cain ,ries the rear so that the caniwfingers 7 operating on theehasers tend to retract the" chaserjs.`

and basa-.projecties @11d 15 which operates in a slide: 16 in` the. shank of the headandj this farms a Stor 'lekinsthe @am rasnth shank of the' head. A catch notch 17..,is formed in the shank l` fanda `latch l8ope1;

fates in this notch;V Thelatoh is mounted onl a .ria 1.9- i The late/h is affae'ediria cavity 20 inthe @am ries' and hasta Camffa Qlwbeh .projects through aeee1`11e20a inthe Slll outside of the; cavity20-. A spring 22 isar- Screw 23 which positionefandi when the` cani surface' 21 `engages an operating part it th'rovvs the latch and releases the'cain ring.. ,j y' l In rder'toadjustthe position to lWhich the cani ring is'l'ocke'd .and consequentlythe inner position ofthe chasersifl provide any adjusting'screw 24 which is'scr'ewved on to the screw on the rear end of the shank la. This adjusting screw forms the rear shoulder of the catch 17. It has a notch 25 and a finger 26 extends into thisnotch. The finger is ring isswivelled on the rear of the shank. It is adjustable by means of a Spanner Wrench, openings 28 being provided for this purpose. It is ysplit at 29 and can be clampedfor locking adjustment by means of a screWBO. It is locked on the shank by a. spring ring 3l.

In the operation of the device, the cam ranged injflehcavity I2O"y 'and secured' by ya Y erating slots vtothe axis,^feach of said slots being of less ing coiitactwitli ring isv pushed lforward, thus moving the chasers to their inner position, the latch moving into the catch 17 and locking it in this position for cutting the screw. When the screw has reached the desired position, the

latch 21 is made to contact some abutment,

,in theV guide slots and having operating slots in the sides thereof inclined to the axis of the die, said operating slots b'eing of less depth eireumferentially than the thickness of the Chaser in which the slot is arranged; a cam ring; 'and cam fingers on the cam ring and extending into the operating slots, said fingersbeing ynarrower circumferentially than the guideslots and being receivable Wholly within the operating slots, said cam ring being operable to actuate the chasers through the action of the fingers. l

- '2L In a quick-opening die, the combination of a head having 'chaser guide slots inclined to the axis extending inwardly forward; chasers in said slots, said chasers having opin the sides thereof and inclined depth circumferentially than the thickness o ,the chaserin whiclithe slot is arranged; a cam ring; and cam fingers on the ring, said fin gers being narrower circumferentially than the Adepth'cf' the operating slots and extending into the operating slots and arranged in slidthe side walls of the guide slots,"said cam-ring being operable to actuate the chasers through the'action of the fingers. In a quickfopening die, the combination cfa head having cliaser'guide slots inclined to the axisand extendililg .inwardly forward;

chasers arranged in the guide slots and having operatingslots inclined to the axis of the v lie cam fingers extending into the operating slots, a cam ring onwhicli said fingers are mounted, said fingers being fixed relatively to the cam 'ring land the circumferential space `between the cam surfaces being unobstructed; and means for actuating the cai ring for actuating the dies.

yspring the sockets operating against the head for v 1. In a quick-opening die, the combination ot' a head Vhaving chaser guide slots inclined to the axis and extending inwardly forward; chasers arranged in the guide slots and having operating slots inclined to the axis of the die; a cam ring; cam fingers on the cani ring extending into the operating slots; spring sockets in the cam ring; springs in the sockets opeiating against the head for moving the cam ring to retract the dies; and means for locking the cam ring to close the dies comprising a latch carried by the caln ring, a catch onl the' head in which the latch operates, and means for adjusting the catch comprising a ring screw threaded on the head. f

' 5. In a quick-opening die, the combination of a head having chaser guide slots inclined to the axis and extending inwardly forward; chasers arranged in the guide slots and having operating slots inclined to the axis of the die; a cam ring; cam fingers on the cam ring extending into the operating slots; sockets in the cam ring; springs in moving the cam ring to retractthe dies; rand means for locking the cam ringr to close the dies comprising a latch carried by the cam ring, a catch on the head in which the latch operates, and means for adjusting the catch comprising a ring screw threaded on the head and means for locking the ring in adgustment comprising a clamping ring mountedon the head.

6. In a quick-opening die, the combination 'of a head having chaser guide slots inclined to the axis extendingY inwardly forward; chasers arranged in said guide slots, saidchasers having operating slotsinclined to` Vthe axis; a cam ring; .cam fingers on the cam ing extending intothe operating slots; said "cam ring being axially movable on the head;

lsprings tending to retract the cam ring; a latch carried by the cam ring; a catch on the head with which the latch engages; a screw ring on the head for adjusting the catch;

and means for locking the screw ring in adjustment.

In testimony whereof I have hereunto ser my hand. 

